What is the difference between a structure in C and a structure in C-plus-plus?

Answer 1

Not much. C++ structures are the same, i.e., still declared with "struct".. Are you sure that you didn't mean to ask: "What's the difference between a structure and a class?" Cause, that's the main (DRUMROLL PLEASE) power of C++, among other things.

I think there is a difference in them. In struct of C there are no Member functions allowed .( you can use function pointer but not the definition in the structure ). But in C++ you have that flexibility .
A C++ struct is exactly the same as a C++ class, except that struct members are public by default while class members are private by default. Access to individual members can be overridden in the declaration thus either can be used for the same purpose. C++ programmers use classes to define most object types and reserve the struct type for backward-compatibility with C.

A C struct has member variables but has no methods. Accessibility cannot be defined, thus all members are effectively public at all times.